一叶秋碱对人结肠癌SW620细胞增殖和凋亡的影响及其机制  

Effect of securinine on proliferation and apoptosis of human colon cancer SW620 cells and its mechanism

作　　者：邓静 王萱 石长玉 杨斯琦 邹亲玲 金明 DENG Jing;WANG Xuan;SHI Changyu;YANG Siqi;ZOU Qining;JIN Ming(Department of Biochemistry and Molecular Biology,School of Medical Sciences,Yanbian University,Yanji 133000,China)

机构地区：[1]延边大学医学院生物化学与分子生物学教研室,吉林延吉133000

出　　处：《吉林大学学报(医学版)》2025年第2期307-316,共10页Journal of Jilin University:Medicine Edition

基　　金：国家自然科学基金项目(82060537)。

摘　　要：目的:探讨一叶秋碱(SEC)对人结肠癌细胞系SW620细胞凋亡的影响,并阐明其可能的作用机制。方法:将皮下移植肿瘤模型裸鼠分为对照组(n=6)、奥沙利铂(OXA)组(n=7)和SEC组(n=7),检测各组裸鼠皮下移植瘤体积和质量并计算肿瘤抑制率。将不同剂量SEC (5~120μmol·L^(-1))分别作用于SW620细胞12、24、48和72 h,细胞计数试剂盒8 (CCK-8)法检测各组细胞存活率,确定SEC最适药物剂量。将SW620细胞分为对照组、20μmol·L^(-1)SEC组、40μmol·L^(-1) SEC组和40μmol·L^(-1) OXA组。采用TUNEL染色法和流式细胞术检测各组细胞凋亡率,JC-1染色法检测各组细胞线粒体膜电位,2',7'-二氯荧光素二乙酸酯(DCFH-DA)荧光染色法和流式细胞术检测各组细胞中活性氧(ROS)水平,Western blotting法检测各组细胞中细胞色素C、B细胞淋巴瘤2 (Bcl-2)、Bcl-2相关X蛋白(Bax)、c-Jun氨基末端激酶(JNK)、磷酸化JNK (p-JNK)、丝裂原活化蛋白激酶p38、磷酸化p38 (p-p38)、细胞外调节蛋白激酶(ERK)和磷酸化ERK (p-ERK)蛋白表达水平。结果:与对照组比较,SEC组裸鼠皮下移植瘤体积及质量明显减小(P<0.05或P<0.01或P<0.001);SEC组和OXA组肿瘤抑制率分别为20.42%及6.50%。CCK-8法检测,与0μmol·L^(-1) SEC比较,SEC剂量大于20μmol·L^(-1)时,SW620细胞存活率明显降低(P<0.001);选定20μmol·L^(-1) SEC、40μmol·L^(-1) SEC和24 h作为细胞后续实验干预剂量及时间。TUNEL法检测,与对照组比较,20和40 mol·L^(-1) SEC组细胞凋亡率明显升高(P<0.05或P<0.001);流式细胞术检测,与对照组比较,40μmol·L^(-1) SEC组细胞凋亡率明显升高(P<0.001)。JC-1染色法检测,与对照组比较,20和40μmol·L^(-1) SEC组线粒体膜电位降低(P<0.001)。DCFH-DA荧光染色法检测,与对照组比较,20和40μmol·L^(-1) SEC组及40μmol·L^(-1) OXA组细胞中ROS水平明显升高(P<0.001);流式细胞术检测,与对照组比较,40μmol·L^(-1) SEC组细胞中ROS水平明显升高(P<0.05)。与Objective:To investigate the effect of securinine(SEC)on apoptosis of the human colon cancer cell line SW620,and to elucidate its possible mechanism.Methods:The nude mice with subcutaneously transplanted tumor were divided into control group(n=6),oxaliplatin(OXA)group(n=7),and SEC group(n=7).The volume and mass of subcutaneous tumors in the nude mice were measured in various groups,and the tumor inhibitory rates in various groups were calculated.The SW620 cells were treated with different doses(5-120µmol·L^(-1))of SEC for 12,24,48,and 72 h,respectively.Cell counting kit-8(CCK-8)assay was used to assess the survival rates of cells in various groups,and the optimal doses of SEC were confirmed.The SW620 cells were divided into control group,20µmol·L^(-1) SEC group,40µmol·L^(-1) SEC group,and 40µmol·L^(-1) OXA group.TUNEL staining method and flow cytometry were used to detect the apoptotic rates of cells in various groups.JC-1 staining was used to detect the mitochondrial membrane potentials of cells in various groups,and 2',7'-dichlorodi-hydrofluorescin diacetate(DCFH-DA)fluorescence staining and flow cytometry were used to measure the reactive oxygen species(ROS)levels in the cells in various groups.Western blotting method was used to detect the expression levels of cytochrome C,B-cell lymphoma-2(Bcl-2),Bcl-2-associated X protein(Bax),c-Jun N-terminal kinase(JNK),phosphorylated JNK(p-JNK),mitogen-activated protein kinase p38,phosphorylated p38(p-p38),extracellular signal-regulated kinase(ERK)and phosphorylated ERK(p-ERK)proteins in the cells in various groups.Results:Compared with control group,the volume and mass of subcutaneously transplanted tumors in the nude mice in SEC group were significantly decreased(P<0.05 or P<0.01 or P<0.001);the inhibitory rates of tumor in SEC group and OXA group were 20.42%and 6.50%.The CCK-8 assay results showed that compared with 0µmol·L^(-1) SEC,when the SEC dose exceeded 20µmol·L^(-1),the survival rates of SW620 cells were significantly decreased(P<0.001).The optimal

关 键 词：一叶秋碱 结肠肿瘤 细胞凋亡 细胞增殖 活性氧 

分 类 号：R33[医药卫生—人体生理学]